Motor-vehicle jack



Oct. 12 1926. 1,602,707

L. ROSENFELD MOTOR VEHICLE JACK l9 Lous .Ebsezz flci Patented Oct. 12, 1926.

UNITED STATES LOUS ROSENFELD, OF SEATTLE, WASHINGTON.

MOTOR-VEHICLE JACK.

Application filed November 30, 1925.

The invention is a lifting jack having a plurality of spur gears which are arranged to operate in two directions thereby lifting the body of the jack from'the base and at the same time forcing the head upward in relation to the body.

The object of the invention is to provide a jack that is particularly adaptable for motor vehicles or the like.

Another object of the invention is to pro vide a jack which has means for positively holding the jack in any position under a load. 7

A further object of the invention is to provide a jack in which the gear reduction is obtained throu h spur gears.

And a still further object of the invention is to provide a jack that is particularly adaptable for motor vehicles which is of a simple and economical construction.

With these ends in view the invention embodies a jack having a casing supported on a spindle, a base in which the spindle is supported, a tubular spindle around the said former spindle gears within the said casing, a worm through which the said gears may be rotated, and a handle for operating the said worm.

Other features and advantages of the invention will appear from the following description, taken in connection with the drawings, wherein Figure 1 is a front elevation ofthe jack, with the outer part of the casing broken away. 7

Figure 2 is a vertical section through the jack.

Figure 3 is a plan with a part broken away.

Figure 4 is a view showing the handle.

In the drawings I have shown my jack as it would be made wherein numeral 1 indicates the casing, numeral 2, the base and numeral 3, the head.

The casing 1 is slidably mounted upon a stationary tubular spindle 4 which is held in the base 2 and which is provided with an inner spindle 5 upon which the head 3 is mounted. The tubular spindle 4 which extends upward to the point 6 has teeth 7 in one side and an opening in the upper portion Serial No. 72,131.

of the opposite side which provides access to teeth 8 inone side of the spindle 5.

A small gear 9 on a shaft 10 in the easing 1 meshes with teeth 7 of the spindle 4 k and another small gear 11 on a shaft 12 meshes with the teeth 8 in the spindle 5. Another gear 13 is also mounted on the shaft 10 and another gear 14 is also mounted on the shaft 12 and both of the gears 13 and 14 mesh with a small gear 15 on'a shaft 16 which is rotatably mounted in the casing 1 and upon which is also a large worm gear 17. The gear 17 meshes with a worm 18 on the main shaft 19., the outer end of which extends beyond the casing and is provided with a square shank 20. It will be observed that as the shaft 19 is rotated in a clock wise direction, it will rotate the shaft 16 through the gears 18 and 17 and the shaft 16 will in turn cause the shafts 10 and 12 to rotate through the gears 15 and 13 and 14; and as the shafts 10 and 12 rotate, they willv rotate the gears 9 and 11 and it will be observed that the gear 9 will cause the casing 1 to raise on the spindle 4 and the gear 11 will raise the spindle 5 out of the casing.

The head 3 may be provided with an extension 21 having a projection 22 thereon so that the jack may be placed under objects that are too low for the upper end of the head.

A handle may be provided as shown in Figure 4 with a socket 23 to engage the square end 20 of the shaft 19, a member 24 pivotally attached to the socket to form a universal joint, a bar 25'extending from the member 24 and having a nut 26 on its outer end so that it may be engaged by a tire wrench or the like, and a coupling 27 operable by a rod 28 for releasing the rod 25 from the member 24 when desired.

It will be understood that changes may be made in the construction without departing from the spirit of the invention. One of which changes may be in the design of the casing. another may be in the exact arrangement of the gears, andstill another may be in the design or arrangement of the handle, orin the use of a wrench. to operate the worm gear.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent, is

In a jack, a spindle having teeth in one I side, a tubular spindle also having teeth in one side, a casing slidable on the said spindles,- a base for rigidly supporting the said tubular spindle, a head at the upper end of the former of the said spindles, gears for engaging the teeth in the sides of the said spindles, other gears for engaging and rotating the said former gears, a means whereby one of the said latter gears may be rotated from the exterior of the said casing and means for holding the said gears.

LOUS ROSENFELD. 

